Apparatus for producing carbid.



M. w. MURRAY. APPARATUS FOR PRODUCING GABBID.

APPLIO LTIOI TILED Ill-80; 1612.

1,052, 1 65. Patented Feb. 4, .1913.

3 I {v 3% z 7 UNITED STATES r iaTEN'r OFFICE. p

MICHAliL MURRAY, OF NEW YORK, N. Y., ASS IGNOR OF FIFTY ONE-HUNDRED'I HS TO GEORGE H. ROSENBLATT, OF NEW YORK, N. Y.

APPARATUS FOR BRODUCING CARI 'ID.

Specification iii-Letters Patent.

Pa t dFeh- Application filed January 30, 1912. Serial No. 674,347.

To all whom it may concern:

Be it known that'I, MICHAEL W. MURRAY, a citizen of the United States of America, and a resident of New York,-county and State of New York, have invented certain new and useful Improvements in Apparatus for Producin Carbid, of which the followirw is a speci cation.

This invention has reference to a novel apparatus for producing high heat from gas mixtures. 1

The furnace is particularly designed for the production of such high temperatures as are required, forinstance, in the manufac ture of calcium carbid, carborundun'i, and the like.

Forthe production of calcium carbid, for instance, processes are employed of a purely thermal character and the cost of production depends entirely on the method employed for generating the caloric energy to which the mixture of the prepared components of the substance to be made is subjected usually for fusion. Such high temperaturesas are required for making calcium carbid are pro duced usually with the electric are which is relatively expensive even when the current is generated by water power. This limits the application of the final product and in some instances renders its use pro.- hibitive.

It is the purpose of the present invention to produce a furnace by means of which such high temperatures may be obtained at a greatly reduced cost and according to purely chemical methods. This has been primarily attained by in novel furnace in which gas mixtures are combusted through surface resistance whereby a surface combustion is obtained. Means are. provided for mixing air and gas and carbureting same, and means for subjecting the material to be fused, as for instance, in the production of calcium carbid to the action of the exceedingly high temperature produced by the furnace.

In order to render the invention entirely clear, reference is made to the accompany ing drawing in which:

Figure 1 represents in vertical central section a furnace for producing exceedingly and Fig. 3 is a horizontal section of certain parts of the apparatus with a conveyer pit and endless apron.

Similar characters of reference denote like. parts in all the figures.

In the drawing 1 represents the air inlet,

2 is the gas inlet and 3 a valve for both inlets. A pipe 4 leads from said valveto a mixing chamber 5. Above the mixing chamber there is a valve 6 from which a pipe 7 leads to a super-heater 8 wherein the mix' ture of gas and air may be heated in any suitable manner. From the super-heater a pipe 9 connects with a valve 16 and a second vertical pipe 11 connects the valves (Land In this manner the gas mixture may be conducted into the. furnace without passing the super-heater which may be desirable in certain instances A pipe 19. leads from the valve 10 horizontally andis bent at a right angle to pass into the furnace' The construction ofthe furnace is rela tively simple. There is a steel foundation 14 which support-sregular brick work ,15 leaving however a conveycr pit 16 through which a conveyer 17 passes during the operation of the furnace, as .will be more fully described hereinafter. Above the conve vcr 17 there are several diaphragms of wirc net workwith asbestos packing. Three diaphragnis are shown on the drawing and designated l8, l9, and 20. Between these diaphragms there are beds of small pieces of highly refractory materials 18, 19 as shown Ill Fig. 1 such as suitable refractory metal UXltlH for instance thorium oxid. These rcfrm'tory oxids represent the surface resistance, whereby a surface combustion is obtained. These oxids are heated. by the combusting gas mixture and when in an incandescent condition do l10t--Ollly offer a great surface to the combustion gas, but

also aid in the decomposition of the co1uponents of the gas mixture as a contact substance, whereby exceedingly high telnpertures are obtained. Above the diaphragm 20 there is a space 21 which is thrfeed box for the furnace into which the gas mixture passes. Above-this space regular brick work is provided'which is held in place preferably by a bottom metal plate 23 and a top metal plate 24.

4 Above the top plate 2 4 of the regular brick work there is a carbdreter 25 closed on all sides and having a top cove i 9(3 and some between the gas and air supply and the feed box should this be found desirable in certain applications. Atthe bottom of the carbureter' there is a pipe 31 leadin from same into the pipe 30. It is evident t rat the *valve 28, as well as the valves 6 and 10, must be two way valves to answer the purpose required. On the right side of the carbureter there is a spray valve 32 through which the carbureting substances are introduced in the form of gas. At the rear end of the furnace pipes 33 are provided which lead into a blower 34. ihis blower in turn connects with a storage tank 35 where the exhaust gases are collected; In this way the exhaust gases may be utilized for any purpose desired. On the innerside Walls adjoining the diaphragms 18, 19, and 20 the furnace is carbon.

lined with asbestos packing 36 to protect said walls and retain the heat within.

For carbureting the mixture of gas and air hydrocarbons are, used which arerich in For instance such substances as have two 'or more automatic connections between two carbon atoms like ethylene of the fatty series, or hydrocarbons of the aromatic series having preferably more than one ring or nucleus in the molecule. For exceedingly high temperatures vapors of picric acid 2-4-6 trinitrophenol may be used as a carbureting ,substance.

I- claim as my invention:

1. An apparatus for producing high heat from gas mixtures, comprising means for mixing air and gas, means for super-heating the gas mixture, and a furnace consisting essentially of bottom brick work with a conveyor pit therein, a conveyer for the raw material within said pit, diaphragms of wire net work with refractory packing thereon in the space above the conveyor pit, beds of .small pieces of refractory substances be tween said diaphragms forming a highly refractory surface resistance to the combusting gas mixture, and'means for introducing the gas mixture above said; diaphragms.

2. An apparatus for pr oducing high heat from gas mixtures, comprising means for mixing air and gas, means for super-heating the as mixture, and a furnace consisting es sentially of bottom brick work with a conveyer pit therein, a conveyor for the raw materiatwithin said pit, diapbragms of wire not work with refractory packing thereon in the space above the conveyer pit, beds of small pieces of refractory substances between said diaphragms forming a highly refractory surface resistance to the combust? ing gas mixture, and a gas feed box above said diaphragms into which the superheated gas mixture is conducted.

-3. An apparatus for producing high heat from gas mixtures, comprising means for mixing air and gas, means for super-heating the gas mixture, and a furnace consistingessentially of bottom brick work with a conveyer pit therein, a conveyor for the raw material within said pit, diaphragms of wire net work with refractory packing thereon in the space above the conveyor pit, beds of small pieces of refractory substances between said diaphragms forming a highly refractory surface resistance to the combu'sting gas mixture, a gas feed box above said diaphragms into which the super-heated gas mixture is conducted, and a carburetor wlth checker brick work therein, in the central top portion of the furnace adapted to be connected with the gas feed box.

4. An apparatus for producing calcium carbid, comprising a furnace, consisting essentially of bottom brick .work with a conveyor pit formed therein, a conveyor for the coke and lime mixture within said pit, diaphragrns of wire net work with asbestos packing thereon in the space above the conveyer pit, beds of small pieces of thorium oxid between said diaphragms forming a highly refractory surface resistance to the combusting as mixture, at gas feed box above the diaphragms, brick wonk above said feed box, a carburetor with checker brick work within on the top center portion of the furnace adapted to be connected with the gas "feed box, and means for removing and storing the exhaust gases.

5. In apparatuslfor producing calcium carbid, a furnace comprising a number of diaphragms of wire net work with refractory. packing thereon, beds of small pieces of refractory substances between said dia phragms forming a highly refractory surface resistance, means for passing'gas mixtures through same, a conveyor pit below said diaphragms, and a conveyor passing. through same. 4

6. in apparatus for producing calcium carbid, a furnace comprising a number of diaphragms of wire net work with refractory packing thereon, beds of small pieces of refractory'substances between said diaphragms forming a'highly refractory-sure face resistance, means for passing gas mixtures through same, a conveyer pit below said diaphragms, and aconveyer passing through same, and pipes at the rear end of the furnace for conducting awaythe exhaust gases; I

'I. In apparatus for producing calcium car-bid, furnace, means therein for forming a highly refractory surface resistance to the combusting gas mixture, means for conveying the coke and lime mixture through the heated zone, a carbureter at the top central 1 Signed at New York, N. Y., this 27th day portion of the furnace with checker brick of January 1912.

MICHAEL 'W. MURRAY.

Witnesses:

MARIE H. LEHR, EMMA A. MOCARRICK.

work Within, and a pipe for conducting away the carbureted gases. 

